Lock.



No. 630,6l4. PatentedAugl 8, I899.

- 'LUOKENBACH.

LOCK. I v

' (Application filed Jan. 5, 18 99.)

(No Mbdoi.)

IITNESSES: Z INVENTOR m y 7 ATTOR N EYS 7 U ITED STATES PATENT FFICEE.

ROYER LUOKENBAOII, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO N. A. STOCKTON, OF SAME PLACE.

SPECIFICATIONforming part of Letters Patent No. 630,614, dated August 8, 1899.

Application fi d January 5,1899. erial No. 701,210. (No model.)

To all whom, it may concern.-

Beit known that I, ROYER LUOKENBAOH, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Locks, of which the following is a specification.

My invention relates to certain improvements in locks.

The invention is illustrated in the accompa: nying drawings, wherein like reference characters indicate similar parts throughout the several views, in which- Figure l is a view in elevation of a lock embodying my improvement with the side plate thereof removed. Fig. 2 is a detail sectional view on the line 2 2 of Fig. 1, the bolt-spring, &c., being removed to more clearly show the tumbler and its seat. Fig. 3 is a fragmentary plan View of the tumbler-seat of the side plate. Fig. 4 is a detail View of the opposite side of the tumbler from that shown in Fig. 1. Fig. 5 is an edge view thereof.

In the drawings, 1 represents the casing of a mortised lock. 2 is the lockingbolt, guided by a stud 3, working in a slot 4 therein, and held normally advanced by a spring 5.

6 represents the knob-shaft, 7 the knob, and 8 an arm fast to the shaft and exteudingdownward to engage an opening 9 of the bolt, by means of which the bolt may be operated by the rotation of the knobs, as will be explained.

10 represents a tumbler rotatably mounted in a seat 11 of the side plate of the lock-casing and provided with a lug 12, working between stops 13 14, by which its rotary movement is limited.

15 represents the socketed extremity of a stud-shaft of the tumbler, into which a thumbpiece 16 is secured by an escutcheon 17, attached exteriorly to the door. This stud proj ects through a slot 18 of the bolt, which there- 'by serves as an additional guide for the latter in its backward-and-forward movement.

19 represents a spring which engages a tangentially-disposed undercut seat 20 of the tumbler and sustains the latternormallyin locked relation with the bolt. This locking engagement between the bolt and tumbler is eifected through a circumferential lug or flange 21, formed in part with the tumbler and extending parallel with its axis. It lies normally in the path of travel of the bolt, as shown in Fig. 1, and thereby prevents the withdrawal of the latter.

22 represents a peripheral tooth of the tumbler, which upon proper adjustment of the latter't'. 8., a rotary movement to the rightmay be caused to snap into engagement with the hook-like extremity 23 of a spring 24, where it is yielding] y held against the action of the spring 19. Its release and return to its normal position are effected automatically by the backward movement of the bolt, which engages the spring-hook and forces it rearwardly, whereupon the tumbler under the influence of its spring 19 is caused to follow up the bolt as the latter is spring-advanced and resumes its locked relation with respect thereto. By an adjustment of the tumbler in the opposite direction-i. 6., to the left-the locking projection 21 thereofmay be shifted out of the path of travel of the bolt, thereby permitting the free withdrawal and advance of the same under the control of either knob. The tumbler is retained thus adjusted by the spring 19 engaging an angular extension 25 of the main seat 20, which is clearly shown in Fig. 4. The stops 13 and 14 in limiting the rotary movement of the tumbler thereby facilitate its ready adjustment. The look as described is designed to be controlledfrorn the inside of the door by the thumb-piece 16, above referred to, and from the outside by a suitable key entering through the opening 26 in the side plate formed centrally of the tumbler-seat.

The engaging means between the key and tumbler is peculiarly arranged to render picking the lock extremely difficult. Within an' annular chamber formed by a flange upon the outer face of the tumbler sockets 27 are diametrically arranged in a line at a right angle to the key-opening of the side plate, being thereby completely concealed from View. To effect a proper engagement, it is necessary after in troducing the key to cause the wards thereof to'enter the sockets to secure the necessary hold upon the tumbler to control its movement. Assuming that the key has been properly entered, it is turned to the left, the result being a rotary movement of the tumbler in the same direction until the stop-lugs 12 and 13 engage, in which position the locking projection 21 is shifted out of the path of travel of the bolt and the peripheral tooth 22 is yieldingly held by the spring-hook 23. The bolt may then be Withdrawn by the rotation of the knob, and, as has been before described, the several parts automatically resume their locked relation.

It will be apparent that the key may be employed to adjust the tumbler in the opposite direction.

By altering the distance between the sockets 27 and increasing their number, &c., a key of special design may be required for each lock.

Having thus fully described my invention, what I claim as new is 1. The combination with a locking-bolt, of a rotary spring-held tumbler having a key and hand adjustment to the right and left and provided with two locking projections, one of the projections being adapted to partly inclose the inner extremity of the bolt in locked position, a. spring lying in the path of travel of the bolt and relatively located to engage and yieldingly retain the second looking projection of the tumbler upon adjustment of the latter, as and for the purpose specified.

2. In combination, a spring-ad vanced bolt, a knob-shaft and connecting means for actuating the bolt through the knob-shaft, a rotary tumbler having a key and hand adjustment to the right and left and provided with two locking projections, one of the projections being adapted to partly inclose theinner extremity of the bolt in locked position, a spring lying in the path of travel of the bolt, and relatively located to engage and yieldin gly retain the second locking projection of the tumbler upon adjustment of the latter, as and for the purpose specified.

In testimony whereof I aflix my signature in the presence of two Witnesses.

ROYER LUCKENBACII.

\Vi tnesses:

MARIE BEAUMONT, \VASIIINGTON W. Janus. 

